But this is a mostly American forum? Why say it is wrong to use the American word? Everyone understands what the poster meant. You wouldn't correct someone using the American billion just because it happened to be about a UK company either.
"College" in the UK education system already has a definition; it is the place you go from 16 to 18, studying a narrower curriculum than regular school prior to 16. You will also hear references to "sixth form college", which is the same 16-18 education but delivered at the same physical school as under-16 teaching.
Given the time of day and the subject matter I suspect most people discussing this on here are not from the US.